Ohh... Oblivion is gorgeous :) one of the oboe professors at my college played that on her recital

Anyways, for violin...check out Tango Etudes (originally for flute). I bought mine from Sheet Music Plus.com and am working on the third one for my recital. There are 6 all together. There's a NAXOS recording (with other tango works, like histoire du tango) with Irmgard Toepper playing flute with a guitarist.

There's also Histoire du Tango and a book of about a dozen guitar and violin duos by Piazzolla too...in case you have a guitarist who's interested or a pianist who wants to arrange it for piano.

I'm not sure about string quartets, but if you wanted to stray from Tango a bit and stick with South America, there's Villa-Lobos quartets.

Hmm... and I know that you prefer music already published but you might want to see what's available from up and coming composers from other countries.

However, to my knowledge, Piazzolla is one of the only people who really captured tango music and infused classical with it...he was very devoted ...I've seen some arrangements for orchestras and such that were called things like "Tango Corto"...and frankly, they were watered down pieces of you know what...

Good luck and if you find any other composers who worked with tangos, I'd be interested to know about them!

There is a movement from one of the Beethoven quartets that is written as a tango. I don't know for certain if there is one, but try to find an arrangement of Lalo's Symphonie Espanol, the third movement specifically. I've written some peices that incorporate tangos, I'd be happy to arrange them for chamber ensemble if you'd like (currently they are all violin solo peices). I can be contacted by way of e-mail. The address is fishmon@sbcglobal.net .

I recommend "Tangos & More: Six Dances for String Quartet" by Michael McLean. They are as fun to play as they are to hear--terrific encores for a performance or finale for a gig. Published by Latham Music, Ltd. There is also a nice 4 part arrangement of Carlos Gardel's "Tango: Por Una Cabeza" (Tango played in "Scent of a Woman" and "True Lies") by Matthew Naughtin.

...I have a live recording of Argerich,Kremer and Maïsky playing the Tscaïkoski trio on Deutsche Grammophone...at the end,as an encore, they play a very sad and moving Tango...The recording is easy to find..."Tango Pathétique" written by Pieter Kiesewitter...also the Shostakovith trio on this live recording...

I wrote a short song cycle in 2002 called Tango Suite for contralto, string quartet and double bass. Being a sextet perhaps that's a little outside of what you are looking for, but thought I'd mention it anyway.

"Roxanne" by the Police works terrific in that format, and it's hilarious-there was a movie out a few years ago with Nicole Kidman, a comedy, but I can't remember the name of it, that had all these modern tunes in it,and they did that one with an old guy playing the violin,it was awesome.........